US4500837A - Detection of DC content in an AC waveform - Google Patents

Detection of DC content in an AC waveform Download PDF

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Publication number
US4500837A
US4500837A US06/225,226 US22522681A US4500837A US 4500837 A US4500837 A US 4500837A US 22522681 A US22522681 A US 22522681A US 4500837 A US4500837 A US 4500837A
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US
United States
Prior art keywords
waveform
phase
content
instantaneous value
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US06/225,226
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English (en)
Inventor
Kenneth C. Shuey
Charles L. Doughman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sundstrand Corp
Original Assignee
Westinghouse Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Assigned to WESTINGHOUSE ELECTRIC CORPORATION, A CORP. OF PA. reassignment WESTINGHOUSE ELECTRIC CORPORATION, A CORP. OF PA. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: DOUGHMAN CHARLES L., SHUEY KENNETH C.
Priority to US06/225,226 priority Critical patent/US4500837A/en
Priority to FR8124605A priority patent/FR2497956B1/fr
Priority to JP57003529A priority patent/JPS57141563A/ja
Priority to GB8201067A priority patent/GB2091506B/en
Priority to DE19823201131 priority patent/DE3201131A1/de
Publication of US4500837A publication Critical patent/US4500837A/en
Application granted granted Critical
Priority to JP1990070733U priority patent/JPH0530138Y2/ja
Assigned to SUNDSTRAND CORPORATION reassignment SUNDSTRAND CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: WESTINGHOUSE ELECTRIC CORPORATION
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/50—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to the appearance of abnormal wave forms, e.g. ac in dc installations
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/337—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration
    • H02M3/3376—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration with automatic control of output voltage or current
    • H02M3/3378—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration with automatic control of output voltage or current in a push-pull configuration of the parallel type
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/538—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a push-pull configuration
    • H02M7/53803—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a push-pull configuration with automatic control of output voltage or current
    • H02M7/53806—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a push-pull configuration with automatic control of output voltage or current in a push-pull configuration of the parallel type
US06/225,226 1981-01-15 1981-01-15 Detection of DC content in an AC waveform Expired - Lifetime US4500837A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US06/225,226 US4500837A (en) 1981-01-15 1981-01-15 Detection of DC content in an AC waveform
FR8124605A FR2497956B1 (fr) 1981-01-15 1981-12-31 Dispositif et procede pour la detection de la composante continue d'une courbe alternative
JP57003529A JPS57141563A (en) 1981-01-15 1982-01-14 Method of and apparatus for measuring component containing direct current in ac waveform
GB8201067A GB2091506B (en) 1981-01-15 1982-01-14 Detection of dc content in an ac waveform
DE19823201131 DE3201131A1 (de) 1981-01-15 1982-01-15 Verfahren und einrichtung zur bestimmung des gleichstromanteils in einer wechselstromschwingung
JP1990070733U JPH0530138Y2 (fr) 1981-01-15 1990-07-04

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/225,226 US4500837A (en) 1981-01-15 1981-01-15 Detection of DC content in an AC waveform

Publications (1)

Publication Number Publication Date
US4500837A true US4500837A (en) 1985-02-19

Family

ID=22844046

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/225,226 Expired - Lifetime US4500837A (en) 1981-01-15 1981-01-15 Detection of DC content in an AC waveform

Country Status (5)

Country Link
US (1) US4500837A (fr)
JP (2) JPS57141563A (fr)
DE (1) DE3201131A1 (fr)
FR (1) FR2497956B1 (fr)
GB (1) GB2091506B (fr)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4556842A (en) * 1983-07-26 1985-12-03 Westinghouse Electric Corp. Tracking filter for sensing DC content in an AC waveform
US4622628A (en) * 1983-06-22 1986-11-11 Hitachi, Ltd. PWM inverter apparatus with digital control
US4737658A (en) * 1985-08-05 1988-04-12 Brown, Boveri & Cie Ag Centralized control receiver
US4763068A (en) * 1985-01-26 1988-08-09 Mwb Messwandler-Bau Aktiengesellschaft Method, circuit and apparatus for the elimination of the d.c. voltage components of a capacitive a.c. voltage divider
US4803611A (en) * 1987-02-12 1989-02-07 Mitsubishi Denki Kabushiki Kaisha Apparatus for correcting DC component of output voltage in inverter
US4851763A (en) * 1987-03-19 1989-07-25 Heidelberger Druckmaschinen Ag Current-measuring device, especially for determining the motor current of a direct-current motor
US4905117A (en) * 1988-09-02 1990-02-27 Westinghouse Electric Corp. Circuit and method for DC content protection of parallel VSCF power systems
US4916391A (en) * 1984-11-15 1990-04-10 Doerman Eryk S LVDT displacement sensor with signal noise reduction for use in weighing apparatus
US4941075A (en) * 1989-01-24 1990-07-10 Westinghouse Electric Corp. Timing correction for square wave inverter power poles
US5012400A (en) * 1988-09-26 1991-04-30 Kabushiki Kaisha Toshiba DC/AC power converting apparatus including DC component remover
US5172117A (en) * 1989-06-19 1992-12-15 Linear Instruments Analog to digital conversion using an integrater and a sample and hold circuit
US5461306A (en) * 1993-12-28 1995-10-24 Schlumberger Industries, Inc. DC current detection system for a current transformer
US5694108A (en) * 1996-05-01 1997-12-02 Abb Power T&D Company Inc. Apparatus and methods for power network coupling
DE19740256A1 (de) * 1997-09-12 1998-09-10 Siemens Ag Verfahren zum Erfassen einer Gleichstromkomponente in einem mit einer Wechselstromkomponente überlagerten Signal
US5933073A (en) * 1997-07-07 1999-08-03 Abb Power T&D Company Inc. Apparatus and methods for power network coupling
US5949829A (en) * 1996-11-29 1999-09-07 General Research Of Electronics, Inc. Central error detecting circuit for FSK receiver
US5978371A (en) * 1997-03-31 1999-11-02 Abb Power T&D Company Inc. Communications module base repeater
US6233163B1 (en) * 2000-10-16 2001-05-15 Phoenixtex Power Co., Ltd. Automatic balance adjusting device for AC power supply
US20030141764A1 (en) * 2002-01-28 2003-07-31 Square D Company Real-time digital voltage sag compensator
US20060219682A1 (en) * 2004-11-23 2006-10-05 Johannes Klett High-frequency surgical apparatus and a method for operating same
US20110050278A1 (en) * 2009-08-31 2011-03-03 Maxim Integrated Products, Inc. System for and method of virtual simultaneous sampling with a single adc core
US20180062396A1 (en) * 2016-08-31 2018-03-01 Tyco Electronics Corporation Control circuit configured to determine when a direct current component in an alternating current power line passes a designated threshold

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60107769U (ja) * 1983-12-27 1985-07-22 日本電気ホームエレクトロニクス株式会社 直流分測定回路
FR3038389B1 (fr) * 2015-06-30 2018-10-26 Safran Electrical & Power Circuit de surveillance d'un reseau electrique triphase

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1746935A (en) * 1925-10-27 1930-02-11 Weston Electrical Instr Corp Apparatus for the measurement of very weak alternating currents
US2624770A (en) * 1949-02-11 1953-01-06 Sun Oil Co Vacuum tube voltmeter
US3510753A (en) * 1967-12-04 1970-05-05 Rowan Controller Ripple eliminator for pulsating unidirectional current power supply
US3988689A (en) * 1975-02-07 1976-10-26 National Semiconductor Corporation Offset corrected amplifier
US4305132A (en) * 1978-11-30 1981-12-08 Olympus Optical Co., Ltd. Method to eliminate the noise at known frequency

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3621389A (en) * 1969-06-27 1971-11-16 Ibm Frequency domain analyzer using variable-rate time compression
JPS5754967B2 (fr) * 1974-03-30 1982-11-20
JPS5226874A (en) * 1975-08-25 1977-02-28 Giichiro Kato Rotary type electric field intensity measuring apparatus using a stati onary electrode plate provided with holes
JPS6019752B2 (ja) * 1977-07-27 1985-05-17 日本曹達株式会社 イミダゾ−ル誘導体、その製造方法及び農園芸用殺菌剤

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1746935A (en) * 1925-10-27 1930-02-11 Weston Electrical Instr Corp Apparatus for the measurement of very weak alternating currents
US2624770A (en) * 1949-02-11 1953-01-06 Sun Oil Co Vacuum tube voltmeter
US3510753A (en) * 1967-12-04 1970-05-05 Rowan Controller Ripple eliminator for pulsating unidirectional current power supply
US3988689A (en) * 1975-02-07 1976-10-26 National Semiconductor Corporation Offset corrected amplifier
US4305132A (en) * 1978-11-30 1981-12-08 Olympus Optical Co., Ltd. Method to eliminate the noise at known frequency

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4622628A (en) * 1983-06-22 1986-11-11 Hitachi, Ltd. PWM inverter apparatus with digital control
US4556842A (en) * 1983-07-26 1985-12-03 Westinghouse Electric Corp. Tracking filter for sensing DC content in an AC waveform
US4916391A (en) * 1984-11-15 1990-04-10 Doerman Eryk S LVDT displacement sensor with signal noise reduction for use in weighing apparatus
US4763068A (en) * 1985-01-26 1988-08-09 Mwb Messwandler-Bau Aktiengesellschaft Method, circuit and apparatus for the elimination of the d.c. voltage components of a capacitive a.c. voltage divider
US4737658A (en) * 1985-08-05 1988-04-12 Brown, Boveri & Cie Ag Centralized control receiver
US4803611A (en) * 1987-02-12 1989-02-07 Mitsubishi Denki Kabushiki Kaisha Apparatus for correcting DC component of output voltage in inverter
US4851763A (en) * 1987-03-19 1989-07-25 Heidelberger Druckmaschinen Ag Current-measuring device, especially for determining the motor current of a direct-current motor
US4905117A (en) * 1988-09-02 1990-02-27 Westinghouse Electric Corp. Circuit and method for DC content protection of parallel VSCF power systems
US5012400A (en) * 1988-09-26 1991-04-30 Kabushiki Kaisha Toshiba DC/AC power converting apparatus including DC component remover
US4941075A (en) * 1989-01-24 1990-07-10 Westinghouse Electric Corp. Timing correction for square wave inverter power poles
US5172117A (en) * 1989-06-19 1992-12-15 Linear Instruments Analog to digital conversion using an integrater and a sample and hold circuit
US5461306A (en) * 1993-12-28 1995-10-24 Schlumberger Industries, Inc. DC current detection system for a current transformer
US5694108A (en) * 1996-05-01 1997-12-02 Abb Power T&D Company Inc. Apparatus and methods for power network coupling
US5949829A (en) * 1996-11-29 1999-09-07 General Research Of Electronics, Inc. Central error detecting circuit for FSK receiver
US5978371A (en) * 1997-03-31 1999-11-02 Abb Power T&D Company Inc. Communications module base repeater
US5933073A (en) * 1997-07-07 1999-08-03 Abb Power T&D Company Inc. Apparatus and methods for power network coupling
DE19740256A1 (de) * 1997-09-12 1998-09-10 Siemens Ag Verfahren zum Erfassen einer Gleichstromkomponente in einem mit einer Wechselstromkomponente überlagerten Signal
US6233163B1 (en) * 2000-10-16 2001-05-15 Phoenixtex Power Co., Ltd. Automatic balance adjusting device for AC power supply
US20030141764A1 (en) * 2002-01-28 2003-07-31 Square D Company Real-time digital voltage sag compensator
US7112898B2 (en) * 2002-01-28 2006-09-26 Square D Company Real-time digital voltage sag compensator
US20060219682A1 (en) * 2004-11-23 2006-10-05 Johannes Klett High-frequency surgical apparatus and a method for operating same
US7666182B2 (en) * 2004-11-23 2010-02-23 Bowa-Electronic Gmbh High-frequency surgical apparatus and a method for operating same
US20110050278A1 (en) * 2009-08-31 2011-03-03 Maxim Integrated Products, Inc. System for and method of virtual simultaneous sampling with a single adc core
CN102004184A (zh) * 2009-08-31 2011-04-06 马克西姆综合产品公司 利用单个adc芯的虚拟同时采样的系统和方法
US8564277B2 (en) * 2009-08-31 2013-10-22 Maxim Integrated Products, Inc. System for and method of virtual simultaneous sampling with a single ADC core
CN102004184B (zh) * 2009-08-31 2015-07-15 马克西姆综合产品公司 利用单个adc芯的虚拟同时采样的系统和方法
DE102010035803B4 (de) 2009-08-31 2019-08-01 Maxim Integrated Products, Inc. System und Verfahren zum virtuellen simultanen Abtasten einem einzelnen ADC Kern
US20180062396A1 (en) * 2016-08-31 2018-03-01 Tyco Electronics Corporation Control circuit configured to determine when a direct current component in an alternating current power line passes a designated threshold
WO2018042328A1 (fr) * 2016-08-31 2018-03-08 Te Connectivity Corporation Circuit de commande conçu pour déterminer lorsqu'une composante de courant continu dans une ligne électrique de courant alternatif franchit un seuil désigné
US10608440B2 (en) * 2016-08-31 2020-03-31 Te Connectivity Corporation Control circuit configured to determine when a direct current component in an alternating current power line passes a designated threshold

Also Published As

Publication number Publication date
FR2497956A1 (fr) 1982-07-16
JPH0312173U (fr) 1991-02-07
DE3201131A1 (de) 1982-10-21
GB2091506B (en) 1984-05-23
JPS57141563A (en) 1982-09-01
FR2497956B1 (fr) 1986-02-28
GB2091506A (en) 1982-07-28
JPH0530138Y2 (fr) 1993-08-02

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